title: Evaluation of pneumococcal vaccine.
mesh_terms: D001428:Bacterial Vaccines / Q000592:standards*; D003362:Cost-Benefit Analysis; D006801:Humans; D008875:Middle Aged; D013296:Streptococcus pneumoniae / Q000276:immunology*; D014611:Vaccination / Q000191:economics
chemical_list: D001428:Bacterial Vaccines